Bioactive agent release coating and controlled humidity method
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Abstract
A coating composition in the form of a one or multi-part system, and method of applying such a composition under conditions of controlled humidity, for use in coating device surfaces to control and/or improve their ability to release bioactive agents in aqueous systems. The coating composition is particularly adapted for use with medical devices that undergo significant flexion and/or expansion in the course of their delivery and/or use, such as stents and catheters. The composition includes the bioactive agent in combination with a first polymer component such as polyalkyl(meth)acrylate, polyaryl(meth)acrylate, polyaralkyl(meth)acrylate, or polyaryloxyalkyl(meth)acrylate and a second polymer component such as poly(ethylene-co-vinyl acetate).
112 Citations
58 Claims
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1-40. -40. (canceled)
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41. A method for adjusting the rate of release of a bioactive agent from a coating composition provided in vivo, the method comprising the steps of:
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a) providing the coating composition comprising a bioactive agent in combination with a plurality of polymers, including a first polymer component selected from the group consisting of polyalkyl(meth)acrylates and aromatic poly(meth)acrylates, and a second polymer component comprising poly(ethylene-co-vinyl acetate), and b) altering a humidity level in which the coating composition is applied to a surface of a medical device to adjust the bioactive agent release profile, whereby increasing the humidity level accelerates the release of the bioactive agent and decreasing the humidity level decelerates the release of the bioactive agent. - View Dependent Claims (42, 43, 44, 45, 46)
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47. A method for adjusting the rate of release of a bioactive agent from a coating composition provided in vivo, the method comprising the steps of:
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a) providing the coating composition comprising a bioactive agent in combination with a plurality of polymers, including a first polymer component selected from the group consisting of polyalkyl(meth)acrylates and aromatic poly(meth)acrylates, and a second polymer component comprising poly(ethylene-co-vinyl acetate), and b) accelerating the release of the bioactive agent in vivo by increasing a humidity level in which the coating composition is applied to a surface of a medical device. - View Dependent Claims (48, 49, 50, 51, 52)
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53. A method for adjusting the rate of release of a bioactive agent from a coating composition provided in vivo, the method comprising the steps of:
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a) providing the coating composition comprising a bioactive agent in combination with a plurality of polymers, including a first polymer component selected from the group consisting of polyalkyl(meth)acrylates and aromatic poly(meth)acrylates, and a second polymer component comprising poly(ethylene-co-vinyl acetate), and b) decelerating the release of the bioactive agent in vivo by decreasing the humidity level in which the coating composition is applied to a surface of a medical device. - View Dependent Claims (54, 55, 56, 57, 58)
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Specification